Gear-casing for grinding-machines.



J. M. THOMPSON. GEAR CASING FOR GRINDING MACHINES.

APPLIGATION FILED APR. 26. 1909 Patented Mar.3,1914.

2 SHEETS-SHEET 1.

WITNES-$S a I/vwE/vToR ATTORNEYS.

COLUMBIA FLANOGRAPN co.. wAsmNu'roN, D, c.

J. M THOMPSON. GEAR CASING FOR GRINDING MACHINES. APPLICATION FILED APR.26.1909.

1,089,022, Patented Mar. 3, 1914.

2 SHEETS-SHEET 2.

Wmvzssas INVZNTOR fi WM 4am JAMES M. THOllIPSON, 0F MIL'WAUKEE, WISCONSIN.

GEAR-CASING FOR GRINDING-MACHINES Specification of Letters Patent.

lPatented Mar. 3, .ttli

Application filed April 2c, 1509. sea-a1 No. 49235.

To all whom it may concern Be it known that l, JAMES M. TuoiursoN, a citizen of the United States, residing at Milwaukee, county of lliilwaulzee, and State of "Wisconsin, have invent-ed new and useful improvements in Gear-Casings for Grinding-lr'iachines, of which the following is a specification.

My invention relates to improvements in gear casings for grinding machines, with particular reference to that class of machines in which the driving gears are in closed in a suitable casing provided with. bearings for toe gear wheel shafts, and supporting clamping connections. Heretofore gear casings for this class of machines have either been divided in a plane transverse to the gear shafts, or in a plane extending between the shafts so that it is necessary to take the machine apart in order to open the casing and it has been found practically in1- possible to ire-assemble the parts of the easing in exactly their original position. Unless this is done, the shafts bind in the bearings or the gear teeth fail to mesh properly, whereby the etliciency of the machine is materially impaired.

The object of this invention is therefore to provide a form of casing in which the relative position of the shafts does not depend upon the casing connections and in which access may be had to the gears without disconnecting or removing the grinding wheel, shafts, actuating crank, or supporting clamps.

it further object of this invention is to improve the tool rest supports structurally with a view of securing two point bearings for all adjustable parts.

in the following had to the which,

Figure 1 is a side elevation of my invention with the casing partially broken away to show the interineshing gears. Fig. 2 is a view of the same as seen from the reverse side. Fig. 3 is a fragmentary sectional view, drawn to a vertical plane cutting the axis of he grinding Wheel shaft.

Like parts are identified by the same. reference characters throughout the several views.

A supporting casing which incloses the gears, and also serves as a frame, is eonr posed of two chambered and nearly semidescription reference is accon'ipanying drawings in cylindrical sections 1 and E2, each having front and rear walls integrally united with each other at the periphery. The sections are connected together by bolts 3 which pass through suitable openings or slots in outwardly projecting ears 4!. A shaft aperture at (5 is bored through the central portion of the casing, preferably at the joint, or line of separation 7 of the sections, and another shaft aperture at 8 bored through the upper section 2 near end of the line of separation 5, which, when the machine is in a position for use, extends diagonally under the shaft aperture (5, downwardly across the central portion of the casing, to the other side. The casing carries an ordinary attaching clamp whereby the machine may be secured to a table or other srqaport. The stationary clamping member 10 is mounted wholly upon the lower portion of the casing, but may have an upward extension 11, provided with an eye to receive the crank shaft 11'. The movable clamping member '3 is carried by the stationary member in the ordinary manner. It is not material whether the clamping nienr ber 10 is formed integrally with the casing or connected therewith by bolts 15 as shown, or otherwise, since it not necessary to remove it, to take the machine apart. The casing is provided with integral hub projections l7 and 18, through which the shaft apertures at 6 and 8 extend, these nrojections providing bearings for the respective shafts.

A grinding wheel 20 is driven from a crank 21, through crank shaft in aperture 6, gear wheel 22, pinion 22-3 and a shaft 2-1; mounted in bearing aperture at S in the upper section of the casing. The shaft 94- is reduced in diameter at one end and the teeth of pinion 23 are cut into the shaft at the shoulder thus formed. The diameter of the pinion is therefore no greater than the large dizuneter of the shaft, and it may be inserted through the shaft aperture at the end which receives the larger portion of this shaft. The crank 91 is split at 30 and provided with a shaft receiving aperture at the end of the split portion of slightly less diameter than the shaft 12, so that it is necessary to spread the parts to some extent to insert the shaft. A clamping bolt 31 61l1- ployed to bind the crank to the shaft.

The tool rests are supported from the casand a little above one ing as follows: The upper section 2 of the casing is provided with an integral outwardly extending fork 35 adjacent to the central portion of the grinding wheel and an outwardly projecting ear 36 is provided on the lower section 1 below this fork. A removable bracket is provided with a slotted member 38 which is adjustably secured to the fork 35 and ear 36 by bolts 39 and 40 respectively, both of which pass through the slot &1 in the member 38. The member 38 extends parallel to the side face of the grinding wheel and the slot extends at an angle to the vertical plane of the wheel axis. The bracket is also provided with a horizontally extending forked arm and a. tool rest d6 is adjustably connected with this arm at two points, viz :by means of a stud es loosely engaged between the fork arms, and also by means of an adjusting screw or bolt 49 which passes between the fork arms and also through a curved slot 50 in a depending arm 51 of the tool rest d6. The tool rest 4:6 also carries an arm 55 extending inwardly along the opposite face of the grinding wheel from that shown in Fi l, and provided with a removable drill rest 56 having a vertical pivot post 57 adapted to engage in a suitable socket in the arm 55, clearly shown in Fig. 2. It will be observed that the slot ll allows the tool rest to be raised or lowered along the surface of the grinding wheel. The two points of con nection through this slot lend stability to the bracket. T he fork d5 permits a horizontal adjustment and the two points of connection give stability to the tool rest at this point. Also with the slot 50 and fork 35, any desired adjustment is possible. Another fork 60 extends from the casing section 2 in the opposite direction, and a chisel rest 61 is secured thereto by an arm 63 having curved slot at and a set screw or bolt 65 )assing between the fork arms and through the slot. As the tool rests are all supported from the uoger section except at the belt at,

it is obvious that the casing can be taken apart without affecting any of the adjustments.

Having thus described my invention, what I claim new and desire to secure by Let-- ters Patent is,

1. A gear casing for grinding machines divided transversely into sections, a shaft mounted in suitable bearings in one section and provided with pinion teeth formed in the body of the shaft, a grinding wheel mounted on said shaft, a driving shaft journaled in said casing members at their meet- 1 l l l l ing margins, and a gear wheel on said shaft meshing with said teeth.

2. A. gear casing for grinding machines divided transversely into sections, a shaft mounted in suitable bearings in one section and provided with pinion teeth formed in the body of the shaft, a grinding wheel mounted on said shaft, a driving shaft journaled in said casing members at their meeting margins, and a gear wheel on said shaft meshing with said teeth, together with a supporting clamping member connected with one of the sections and unconnected with the other section.

3. A gear casing for grinding machines divided transversely into sections, a shaft mounted in suitable bearings in one section at one side of the division line, another shaft journaled in said casing members at their meeting margins, a grinding wheel mounted on one of said shafts, and grinding wheel driving mechanism connecting said shafts, together with a supporting clamping member connected with one of the sections and unconnected with the other section, said clamping member and grinding wheel shaft being mounted upon different sections, whereby the grinding wheel and its supporting section may be removed from the other section without detaching the latter from its support.

4:. A gear cr-sing for grinding machines divided transversely into sections, a shaft mounted in suitable bearings located wholly in one section and provided with pinion teeth formed in the body of the shaft, a grinding wheel mounted on said shaft, tool rests connected with said casing member, a driving shaft journaled in said casing members at their meeting margins, and a gear wheel on said shaft meshing with said pinion teeth.

5.1n a grinding machine, a separable gear casing member provided with a fork, a slot bracket adjustably mou ted on said tork, a connecting member extending zhrough the fork and slot, said bracket also aving a forked arm, tool rest having a .lot rm and connection extending through the arm slot and bracket fork, in cou'ibination with another casing member cooperating with the first casing member in supporting a driving shaft and gear.

in testimony whereof T a'flix my signature in the presenceof two witnesses.

JAB ES hf. THOlafYESON.

esses: LEVERETT C. lVnnnLnn,

R. Enwrn.

Copies; of t is patent may be obtained for five cents each, by addressing the Commissioner of Patent? Washington, D. C. 

